Social networking sites cause deaths to two teenagers recently.

"Daniel Perry was targeted by online blackmailers who it is believed found his Skype address when he tweeted it"

"Hannah Smith had allegedly suffered months of abuse from online trolls on the website Ask.fm" 

SEE WHAT THEY CAN DO TO YOU :O 

Teenager, 17, kills himself after blackmailers trick him into thinking he is on Skype with a girl his own age then threaten to send video of the conversation to his family and friends

Read more : http://www.dailymail.co.uk/news/article-2394520/Dunfermline-teenager-Daniel-Perry-17-kills-blackmailers-trick-Skype.html